zod

Guide Zod schema validation best practices in TypeScript.

Updated Mar 8, 2026

Search Tags:#type safety #typescript #error handling #validation #schema #zod

Ready to run

npx skills add https://github.com/xabierlameiro/price-tracker --skill zod-xabierlameiro

💬 Prompt for ChatGPT / Claude Chat▼

Please help me install this Agent Skill.
Skill: zod
Source: https://github.com/xabierlameiro/price-tracker/tree/main/.agents/skills/zod
Command: npx skills add https://github.com/xabierlameiro/price-tracker --skill zod-xabierlameiro

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes references (resource) and scripts (resource) components.

What problem does it solve?

This Skill provides a comprehensive guide to writing robust, type-safe, and performant validation schemas with Zod, preventing runtime errors and improving developer experience.

Core Features & Use Cases

Schema Definition: Best practices for choosing correct types, validations, and coercions.
Parsing & Error Handling: Strategies for safe parsing, collecting all errors, and providing user-friendly messages.
Type Inference: Leveraging z.infer and distinguishing input/output types for maximum type safety.
Use Case: Ensure all incoming API request bodies are validated against a strict schema, catching invalid data early and preventing application crashes.

Quick Start

Use the zod skill to validate the incoming request body against the user schema.

Frequently Asked Questions about zod

High-intent search queries and answers about installing and using this skill.

FAQPage Schema

How do I validate API request bodies in TypeScript to prevent runtime crashes?▼

Schema validation enforces data integrity by parsing incoming requests against strict Zod definitions. This catches invalid data early, preventing runtime crashes and ensuring only typed, validated data reaches your application logic.

What is the best way to handle Zod parsing errors for user-friendly messages?▼

Handling Zod parsing errors effectively involves using safeParse to collect all validation errors without throwing exceptions. You can then map these detailed error structures to generate user-friendly messages for your application interface.

How does type inference work when defining object schemas with Zod?▼

Type inference with Zod object schemas works by using z.infer to automatically generate TypeScript types from your schema definitions. This distinguishes between input and output types, ensuring maximum type safety across your application.

Can I use schema composition and refinements to build complex validation rules?▼

Schema composition and refinements allow you to build complex validation rules by combining multiple Zod schemas and adding custom validation logic. This enables hierarchical data validation while maintaining strict type safety and performance.

When should I use coercions in my Zod schema definitions?▼

Coercions in Zod schema definitions should be used when you need to transform input data types, like converting strings to numbers, before validation. This ensures correct type validation while preventing runtime crashes from mismatched API payloads.